From c2503cd3be9eacb1dd06ec5b6fba8bb06aac12a8 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Thu, 5 Mar 2009 09:37:40 +0100 Subject: [PATCH] ALSA: hdsp - Ignore MIDI and PCM events in interrupts until initialized Ignore MIDI and PCM events in the interrupt handler until the device gets initialized properly. Otherwise you may get kernel panic by the access to uninitialized devices via hotplugging. Signed-off-by: Takashi Iwai --- sound/pci/rme9652/hdsp.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/sound/pci/rme9652/hdsp.c b/sound/pci/rme9652/hdsp.c index dc65fe1..314e735 100644 --- a/sound/pci/rme9652/hdsp.c +++ b/sound/pci/rme9652/hdsp.c @@ -3740,6 +3740,9 @@ static irqreturn_t snd_hdsp_interrupt(int irq, void *dev_id) midi0status = hdsp_read (hdsp, HDSP_midiStatusIn0) & 0xff; midi1status = hdsp_read (hdsp, HDSP_midiStatusIn1) & 0xff; + if (!(hdsp->state & HDSP_InitializationComplete)) + return IRQ_HANDLED; + if (audio) { if (hdsp->capture_substream) snd_pcm_period_elapsed(hdsp->pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream); -- 2.7.4